Tension device for automatic loom shuttles



J. SHAW Nov. 17, 1931.

TENSION DEVICE FOR AUTOMATIC LOOM SHUTTLES Filed Sept. 19, 1928 Patented Nov. 17, 1931 JAMES SHAW, OF PATERSON, JERSEY TENSION DEVICE FOR AUTOMATIC LOOM SETUT'I'LES Application filed September This invention relates to a tensioning device for loom shuttles which are designed and adapted to receive full quills and from which the empty quills are ejected automatically in the operation of the 100-111.

The principal object of the invention is the provision of device applied to a shuttle body w iich is designed and adapted to keep the quill thread under the proper tension, and to release the thread of the quill when the latter'is ejected from its holding means by another full quill which is automatically inserteo into the shuttle body, the thread of the latter quill being automatically placed under tension, and threaded to the shuttle body in the usual movements thereof.

With the foregoing and other objects in vie. the invention resides in the improved combination, particular construction, arrangement and operation of the parts hereinatter fully described and illustrated in the accompanying drawings, in which-- Figure 1 is a plan view of a shuttle with a quill therein, and the te'nsioning device of the present invention applied to the .body of the shuttle, the parts being shownin the normal relationship.

Fig. 2 is an enlarged side view, partly in section, and portions being broken out, with the parts shown in the normal relatlonshlp.

Fig. 3 is an enlarged plan View of one end of the shuttle, showing the relatlve disposition of the parts when threading the shuttle.

Fig. 4 is a SEClBlOIlitlVlQW taken on the lme 4Lt of Fig. 3. p

Referring now more particularly to the several views of the drawings, 1t Wlll be apparent that, there is shown ashuttle body which is provided with holding means 11 at one end designed and adapted to receivea quill 12, to hold the quill en-dwise therein 1n thread delivering position, and from which the empty quill may be ejected by the pressure of another full quill automatically insert-ed in the holding means 11 of the shuttle body. The shuttle body 10 is provided with a thread groove 13, and a thread outlet hole 14 with pins 15. A box 16 is arranged and securely held in the shuttle body 10 and is positioned with respect to the groove 13 and 19, 1923. Serial No. 306,943.

hole 14:. Tension members 1? are positioned on the shuttle body 10 in cooperative relationship. Each tension member 17 is produced from a single piece of material to provide an eye 18 at one end, coil 19, and spaced thread engaging hooks 20 which also serve as guides. Each tension member 17 is mounted for pivotal movement and this is accomplished by the employment of a pivot or fulcrum screw or other suitable element 21 carried by the shuttle body 10. Each tension member 17 has an inwardly bowed portion 22 for a purpose to appear. The hooks 20 of the tension members 17 are disposed in the box 16 and bear such relationship to each other asto cooperate when moved on their pivots or fulcrums 21 to engage the quill thread and zigzag the same as shown in Fig. 1 to keep the thread under the proper tension. Each tension member 17 is under the influence of an elastic member 23 inthe form of a rubber band,,one end of which is connected with the eye 18 of the relatedtension member 17 and the opposite end thereof is wrapped around a tension screw 2% carried by the shuttle body 10 The elastic members 23 serve for the purpose of. urging the tension member 17 to the positions in which they place the quill thread under tension.

In order to elfect the movement of the tension members 17 to release the thread of the quill when substantially empty, and when the latter is being ejected from the holding means 11 by another full quill which is being substituted for the empty quill in themovement of the shuttle and the operation of other appurtenances of the loom for this puraose, there is provided means presently to be described. A combined latch and cam element 25 is mounted for pivotal movement on a pin 26 extending transversely oi the shuttle body 10. The element 25 is provided with came 27 and is also provided with a notch 28. The element 25 is under the influence of a fiat spring 29, one end of which is secured as at 30 to the shuttle body 10, and the opposite end is constantly in contact with the element 25. The spring 29 has a normal tendency to urge the element 25 to a position to latch the tension members 17 against movement which would permit the hooks to release the quill thread under normal conditions. The element also serves for the purpose of actuating the tension members 17 to release the quill thread in a manner to be explained.

Referring now to Fig. 1 it will be apparent that the parts are in the normal relationship in which the quill. thread is maintained under the proper tension and is threaded through the outlet hole 14:. hen the quill inserted in the shuttle body is substantially empty, there comes a time in the operation of the loom whenanother full quill is automatically delivered to the shuttle body, and presses out the empty one, which on its way out of the shuttle body engages the element 25 causing the same to move on its pivot. This movement of the element causes the came 27 thereof to act on the bowed portions 22 of he tension members 17, causing the latter to be moved to relative positions in which their hooks 2O disengage the thread of the substantially empty outgoing quill, shown most clearly in Fig. 3. It will be apparent that the element is moved against the action of spring 29 which functions immediately after theoutgoing quill is full ejected, to bring the element 25 to its normal position. This allows the elastic members or rubber bands 28 to come into play to move the tension members 17 to relative positions in which their hooks 20 will engage the thread of the incoming full quill, and in the movement of the shuttle the thread will be automatically passed through the outlet hole 14 thereby properly threading the shuttle as well as placing the thread of the quill under the proper tension. It will be apparent that by providing the notch 28 in the element 25 the latter will not interfere with the thread. It will also be apparent that the screws 24; may be adjusted or rotated in order to vary the tension of the elastic members 23.

it is to be understood that the invention is not ted to the precise arrangement of par-ts shown and described, as details of construetion may be modified and rearranged without departing from t e spirit or" the invention, the scope or" which is limited only by the terms of tae appended claims.

I clan A tensioning device for an automatic loom shuttle, compr sing the combination with a shuttle body provided with means for releasably holding a quill, of pivotally mounted members on the shuttle body, said members being provided with c acting thread i ging portions, means acting on said members and having a normal tendency to lzeep them under tension while their thread engaging portions are engaged, and means carried by the shuttle body adapted to be operated by the quill when the latter is being ejected from the holding means, to eli ect the pivotal movement of said members, for the purpose of disengaging said thread engaging portions from the thread.

2. A tensioning device for an automatic loom shuttle, comprising the combination with a shuttle body provided with means for releasably holding a quill, of thread tensioning means carried by said shuttle body, and a spring actuated cam member pivotally connected with said shuttle body adapted to be operated by the quill when the latter is being ejected from the holding means, to actuate said tensioning means, for the purpose of disengaging the tensioning means from the thread.

8. A tensioning device for an automatic loom shuttle, comprising the combination with a shuttle body provided with means for releasably holding a quill, of thread engaging members, tensioning means acting on said members to keep them under tension, means carried by said shuttle body adapted to be operated by quill when the latter is being ejected from said holding means, to cause the actuation of said members, for the purpose of releasing the thread, and means acting on the last mentioned means and having a normal tendency to urge the latter to a normal position, to allow said members to occupy their thread engaging positions.

A tensioning device for an automatic loom shuttle, comprising the combination with a shuttle body provided with means for releasably holding a quill, of thread tensioning means carried by said body to tension the quill thread, and a latch carried by the shuttle body adapted to be operated by the quill when the latter is being ejected from the holding means "for the purpose of disengaging said tensioning means from the thread, said latch being automatically operable to allow the tensioning means to return to normal thread tensioning relation when the quill has been ejected, and also serving to prevent the tensioning means from disengaging itself from the thread.

5. A tensioning device for an automatic loom shuttle, comprising the combination with a shuttle body provided with means for releasably holding a quill, of thread tensioning means carried by said body to tension the quill thread, and means carried by said body adapted to be operated by the quill when the latter is being ejected from the holding means for he purpose oi? disengaging said tensioning means from the thread, 1

said last mentioned means being automatically operable to allow the tensioning means to return to normal thread tensioning relation when the quill has been ejected, and 7 also serving to prevent the tensioning means from disengaging itself from the thread.

JAMES SH'AlV. 

